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added geocode method for resample spatial in the processes json #565

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added geocode method for resample spatial in the processes json #565

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added geocode method for resample spatial
suriyahgit Mar 10, 2026
34e49f8
accomodated the review from matthias on centralising description for …
suriyahgit Mar 10, 2026
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5 changes: 3 additions & 2 deletions resample_spatial.json
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Original file line number Diff line number Diff line change
Expand Up @@ -75,14 +75,15 @@
},
{
"name": "method",
"description": "Resampling method to use. The following options are available and are meant to align with [`gdalwarp`](https://gdal.org/programs/gdalwarp.html#cmdoption-gdalwarp-r):\n\n* `average`: average (mean) resampling, computes the weighted average of all valid pixels\n* `bilinear`: bilinear resampling\n* `cubic`: cubic resampling\n* `cubicspline`: cubic spline resampling\n* `lanczos`: Lanczos windowed sinc resampling\n* `max`: maximum resampling, selects the maximum value from all valid pixels\n* `med`: median resampling, selects the median value of all valid pixels\n* `min`: minimum resampling, selects the minimum value from all valid pixels\n* `mode`: mode resampling, selects the value which appears most often of all the sampled points\n* `near`: nearest neighbour resampling (default)\n* `q1`: first quartile resampling, selects the first quartile value of all valid pixels\n* `q3`: third quartile resampling, selects the third quartile value of all valid pixels\n* `rms` root mean square (quadratic mean) of all valid pixels\n* `sum`: compute the weighted sum of all valid pixels\n\nValid pixels are determined based on the function ``is_valid()``.",
"description": "Resampling method to use. The following options are available and are meant to align with [`gdalwarp`](https://gdal.org/programs/gdalwarp.html#cmdoption-gdalwarp-r), except for `geocode`, which is a backend-specific geocoding/rectification mode:\n\n* `average`: average (mean) resampling, computes the weighted average of all valid pixels\n* `bilinear`: bilinear resampling\n* `cubic`: cubic resampling\n* `cubicspline`: cubic spline resampling\n* `geocode`: geocodes / rectifies data with 2D geolocation layers onto a regular target grid. This mode is intended for curvilinear or swath-like inputs where per-pixel geolocation is available. The current backend implementation requires a non-zero scalar `resolution`. If `projection` is omitted, the backend defaults to EPSG:4326. The `align` parameter is currently ignored for this method.\n* `lanczos`: Lanczos windowed sinc resampling\n* `max`: maximum resampling, selects the maximum value from all valid pixels\n* `med`: median resampling, selects the median value of all valid pixels\n* `min`: minimum resampling, selects the minimum value from all valid pixels\n* `mode`: mode resampling, selects the value which appears most often of all the sampled points\n* `near`: nearest neighbour resampling (default)\n* `q1`: first quartile resampling, selects the first quartile value of all valid pixels\n* `q3`: third quartile resampling, selects the third quartile value of all valid pixels\n* `rms`: root mean square (quadratic mean) of all valid pixels\n* `sum`: compute the weighted sum of all valid pixels\n\nValid pixels are determined based on the function ``is_valid()``.",

@m-mohr m-mohr Apr 15, 2026

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Suggested change
"description": "Resampling method to use. The following options are available and are meant to align with [`gdalwarp`](https://gdal.org/programs/gdalwarp.html#cmdoption-gdalwarp-r), except for `geocode`, which is a backend-specific geocoding/rectification mode:\n\n* `average`: average (mean) resampling, computes the weighted average of all valid pixels\n* `bilinear`: bilinear resampling\n* `cubic`: cubic resampling\n* `cubicspline`: cubic spline resampling\n* `geocode`: geocodes / rectifies data with 2D geolocation layers onto a regular target grid. This mode is intended for curvilinear or swath-like inputs where per-pixel geolocation is available. The current backend implementation requires a non-zero scalar `resolution`. If `projection` is omitted, the backend defaults to EPSG:4326. The `align` parameter is currently ignored for this method.\n* `lanczos`: Lanczos windowed sinc resampling\n* `max`: maximum resampling, selects the maximum value from all valid pixels\n* `med`: median resampling, selects the median value of all valid pixels\n* `min`: minimum resampling, selects the minimum value from all valid pixels\n* `mode`: mode resampling, selects the value which appears most often of all the sampled points\n* `near`: nearest neighbour resampling (default)\n* `q1`: first quartile resampling, selects the first quartile value of all valid pixels\n* `q3`: third quartile resampling, selects the third quartile value of all valid pixels\n* `rms`: root mean square (quadratic mean) of all valid pixels\n* `sum`: compute the weighted sum of all valid pixels\n\nValid pixels are determined based on the function ``is_valid()``.",
"description": "Resampling method to use. The following options are available and are meant to align with [`gdalwarp`](https://gdal.org/programs/gdalwarp.html#cmdoption-gdalwarp-r), except for `geocode`, which is a backend-specific geocoding/rectification mode:\n\n* `average`: average (mean) resampling, computes the weighted average of all valid pixels\n* `bilinear`: bilinear resampling\n* `cubic`: cubic resampling\n* `cubicspline`: cubic spline resampling\n* `geocode`: geocodes / rectifies data with 2D geolocation layers onto a regular target grid. This mode is intended for curvilinear or swath-like inputs where per-pixel geolocation is available. If `projection` is set to `null` or not provided, the backend reprojects to EPSG:4326.\n* `lanczos`: Lanczos windowed sinc resampling\n* `max`: maximum resampling, selects the maximum value from all valid pixels\n* `med`: median resampling, selects the median value of all valid pixels\n* `min`: minimum resampling, selects the minimum value from all valid pixels\n* `mode`: mode resampling, selects the value which appears most often of all the sampled points\n* `near`: nearest neighbour resampling (default)\n* `q1`: first quartile resampling, selects the first quartile value of all valid pixels\n* `q3`: third quartile resampling, selects the third quartile value of all valid pixels\n* `rms`: root mean square (quadratic mean) of all valid pixels\n* `sum`: compute the weighted sum of all valid pixels\n\nValid pixels are determined based on the function ``is_valid()``.",

Regarding:

The current backend implementation requires a non-zero scalar resolution.

The current state of the backend implementation should not be reflected in the specification, which should be stable over time regardless of the implementation.

Is this an implementation detail that will be solved later or is this generally difficult and we should just say:

Requires a non-zero scalar resolution.

The same applies to

The align parameter is currently ignored for this method.

where the "currently" is problematic. If a general implementation is possible, this should not be mentioned and can be adapted in the specific implementation and/or throw a corresponding error.

"schema": {
"type": "string",
"enum": [
"average",
"bilinear",
"cubic",
"cubicspline",
"geocode",
"lanczos",
"max",
"med",
Expand Down Expand Up @@ -157,4 +158,4 @@
"title": "gdalwarp resampling methods"
}
]
}
}
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